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Neelesh Dutta from Innocent Hearts School, JALANDHAR
Subject :NSO    Class : Class 3

Two containers X and Y, of the same size and thickness, contained 1000 mL and 600 mL of water, respectively. Both were heated over two separate flames till the water in them boiled.
If the water used in both containers took 10 minutes to reach boiling point, what conclusions can be made?
1. The flame used for container X is stronger than that used for container Y.
2. Container X is better conductor of heat than container Y.
3. The water in container X was colder than that in container Y at the beginning of the experiment.

A 1 only
B 2 only
C 1 and 2 only
D 1, 2 and 3


Ans 1:

ANSHUL GAJJAR from PODAR INTERNATIONAL SCHOOL, AHMEDABAD
Class : Class 3
D

Ans 2:

Aatreyu from vpms, pune
Class : Class 3
C . (1and 2 only)

Ans 3:

Aatreyu from vpms, pune
Class : Class 3
C . (1and 2 only)

Ans 4:

RAYANSH MISHRA from VIBGYOR HIGH, Pune
Class : Class 3

Ans 5:

Aatreyu from vpms, pune
Class : Class 3
C . (1and 2 only)

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Neelesh Dutta from Innocent Hearts School, JALANDHAR
Subject :NSO    Class : Class 3

Two containers X and Y, of the same size and thickness, contained 1000 mL and 600 mL of water, respectively. Both were heated over two separate flames till the water in them boiled.
If the water used in both containers took 10 minutes to reach boiling point, what conclusions can be made?
1. The flame used for container X is stronger than that used for container Y.
2. Container X is better conductor of heat than container Y.
3. The water in container X was colder than that in container Y at the beginning of the experiment.

A 1 only
B 2 only
C 1 and 2 only
D 1, 2 and 3


Post Your Answer

Neelesh Dutta from Innocent Hearts School, JALANDHAR
Subject :NSO    Class : Class 5

Ans 1:

RAMAYANI PAKHARE from S M SHETTY HIGH SCHOOL, MUMBAI
Class : Class 5
B

Ans 2:

Neelesh Dutta from Innocent Hearts School, JALANDHAR
Class : Class 6

Ans 3:

Ashee Srivastava from APEEJAY SCHOOL NOIDA , NOIDA
Class : Class 6
b

Ans 4:

Ujjwal Upadhyay from Navy Children school, Vasco
Class : Class 5
Answer is B.

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Archana Verma from EuroSchool , Pune
Subject :NSO    Class : Class 4

Avinash grouped plants on the basis of their habitats. By mistake, he placed one wrong plant in each group. Identify the odd member of each group and select the correct option.
Group I : Duckweed, Hydrilla, Opuntia
Group II : Banyan, Mango, Acacia
Group III : Barrel cactus, Joshua tree, Vallisneria

A Duckweed in group I is incorrectly placed and should be replaced with arrowhead plant.
B Mango in group II should be interchanged with Joshua tree in group III.
C Opuntia in group I should be interchanged with Vallisneria in group III.
D Banyan in group II is incorrectly placed and should be replaced with gulmohar.

Ans 1:

KSHITIJ BHATIA from St Francis De Sales, New Delhi
Class : Class 4

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Neelesh Dutta from Innocent Hearts School, JALANDHAR
Subject :NSO    Class : Class 3

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Debarpan Das from Delhi Public School , Durgapur
Subject :NSO    Class : Class 4

Ans 1:

SOUMI PAL from DELHI PUBLIC SCHOOL, DURG
Class : Class 4

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Debarpan Das from Delhi Public School , Durgapur
Subject :NSO    Class : Class 4

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Debarpan Das from Delhi Public School , Durgapur
Subject :NSO    Class : Class 4

Ans 1:

Jayanth from The Deens Academy, Bengaluru
Class : Class 4
You have to specify if waxing or waning crescent

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yagna from DPS, Surat
Subject :NSO    Class : Class 8

Ans 1:

vatsal jay gandhi from new era senior secondary school, Vadodara
Class : Class 8
Please explain it. I am also confused about the answer. I myself did B.

Ans 2:

Nilanjana De from Delhi Public School North, Bengaluru
Class : Class 8
The answer key says that X will not light up,but why?

Ans 3:

Triguna from Kendriya Vidyalaya No.1 Salt Lake, Kolkata
Class : Class 8
X will light up... I think it's incorrect....

Ans 4:

Vaidheesh Bharadwaj from NPS, Bangalore
Class : Class 9
I too am confused as current will also flow through both the bulbs when circuit is closed. It will pass through the switch first and hence lighting up bulb Y.

Ans 5:

Kingshuk Gupta from Delhi Public School, Gurgaon
Class : Class 8

Ans 6:

Abhay Agarwal from St Francis School, Ghaziabad
Class : Class 8
yes i too did B

Ans 7:

Priyanshi from Delhi Public School Agra, Agra
Class : Class 9
Yess,my answer was B also

Ans 8:

Advait talnikar from Dhruv Global School, Sangamner
Class : Class 6
The answer should be B as it will be closed circuit

Ans 9:

Akshay Malhan from NHSS, Thane
Class : Class 8
logically it should be B but sof says otherwise. why ????

Ans 10:

Dev Rawat from R D Rajpal School, New Delhi
Class : Class 8
The answer is B

Ans 11:

Mirudhula from Chettinad Vidyashram, Chennai
Class : Class 9
Option D is correct because current prefers the path that offers less resistance. The bulb provides resistance whereas the switch when closed does not. Hence correct answer is D

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DIKSHIT SUNDAR from vidhysaram, chennai
Subject :NSO    Class : Class 5

Ans 1:

Veer Sehrawat from DPSG, Modinagar
Class : Class 5
The answer is c

Ans 2:

SOUMYARAJ ROY from Kendriya Vidyalaya , Thiruvananthapuram
Class : Class 5

Ans 3:

FAIZAN HUSSAIN from SYED ABID HUSSAIN SR. SEC. CHOOL (MIDDLE SECTION), DELHI
Class : Class 4
Low High Many Many

Ans 4:

shivan iyer from dr pillai global academy, MUMBAI
Class : Class 4
d

Ans 5:

SOUMYARAJ ROY from Kendriya Vidyalaya , Thiruvananthapuram
Class : Class 5

Ans 6:

SOUMYARAJ ROY from Kendriya Vidyalaya , Thiruvananthapuram
Class : Class 5
Sorry , my brother changed the C into D . It should be C only !

Ans 7:

SOUMYARAJ ROY from Kendriya Vidyalaya , Thiruvananthapuram
Class : Class 5

Ans 8:

SOUMYARAJ ROY from Kendriya Vidyalaya , Thiruvananthapuram
Class : Class 5
It is a very serious thing for us that we are getting wrong answers from SOF . It should be D only !

Ans 9:

Ujjwal Upadhyay from Navy Children school, Vasco
Class : Class 5
The answer is d

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